<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    function fblq(n) {
      if (n === 1 || n === 2) {
        return 1
      }
      return fblq(n - 1) + fblq(n - 2)
    }
    console.log(fblq(10))
  </script>
</body>

</html>